Stephen started his working career as a scientist working at the Rutherford Appleton Laboratory, primarily building and operating large pieces of scientific infrastructure, but also working as a visiting professor at University College London.
In 2011 he founded Cella Energy to make hydrogen storage materials and develop the lightweight power systems that use the materials. The company had collaborations in the aerospace and automotive and defence sectors. During that time he raised around $10m from: High Net Worth, Strategic and Venture Capital Investors.
Since leaving Cella he has been running a consultancy business called Krino Partners, which works with SME and UK university technology transfer offices to provide interim management and the expertise needed to find the funding and establish new technology businesses.
In April 2019 he set up a new business called Q5D Technologies which uses robotic tools automate the addition of electrical function in the automotive, aerospace and other sectors. He recently raised seed funding and is busy growing the company.